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Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, before Allowance for Credit Loss	$ 257,738		$ 280,922
REVENUE	521,920	$ 477,700
Revenue from Contract with Customer, Including Assessed Tax	513,214	471,294
Retail Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	478,335	454,008
Other non-606 revenue	7,828	5,526
Wholesale Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	34,465	15,183
Miscellaneous revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	414	2,103
Other non-606 revenue	878	880
RTO Capacity Revenue	414	264
Electricity [Member]
Disaggregation of Revenue [Line Items]
REVENUE	521,920	477,700
Utility \| Retail Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,404	3,811
Utility \| Retail Revenue [Member] \| Residential Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	230,316	219,419
Utility \| Retail Revenue [Member] \| Small Commercial and Industrial
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	79,773	74,947
Utility \| Retail Revenue [Member] \| Large Commercial and Industrial
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	161,963	138,159
Utility \| Retail Revenue [Member] \| Public Lighting
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,879	17,672
Transmission Revenue \| Miscellaneous revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 1,839